水内冷发电机空芯铜导线腐蚀行为研究  

CORROSION OF TUBULAR COPPER CONDUCTOR IN WATER-COOLING GENERATOR

作　　者：谢学军[1] 朱庆胜 樊华 曹顺安[1] 潘玲[1] 龚洵洁[1] 彭珂如[1] 

机构地区：[1]武汉大学动力与机械学院,武汉430072 [2]大唐信阳华豫发电有限责任公司,信阳464100

出　　处：《腐蚀科学与防护技术》2005年第6期429-431,共3页Corrosion Science and Protection Technology

摘　　要：探讨了内冷水中溶解氧、电导率、pH、温度等对空芯铜导线腐蚀的影响规律:(1)只有试液铜离子含量低同时铜表面光亮,才能说明铜腐蚀被有效抑制;(2)除氧条件下,除氧至10μg/L左右,可有效抑制铜的腐蚀;(3)用NaOH、氨水调pH至8.0～9.0能有效抑制铜腐蚀;在试验范围内电导率对铜腐蚀有一定影响;温度升高,试液铜离子含量下降,但试片表面状态发生显著变化.The influence of various factors, such as dissolved oxygen, conductivity, pH value and temperature of waters on corrosion behavior of the tubular copper conductor used for water-cooling generators is studied by experiments in simulated waters. From the results it follows that to correctly evaluate the cupper corrosion, one should take into account the copper content in the solution and also the appearance change of the cupper surface due to corrosion. An effective corrosion prevention of cupper may be realized only if the following conditions are fulfilled that the copper contnet in the solution is low enough and the surface of cupper is still bright ; the residual oxygen content of the water is as low as about 10μg/L;and the pH value of the cooling water is between 8.0 and 9.0, which may be adjusted by adding NaOH or NH3·H2O, The corrosion of cupper is influenced slightly by the conductivity of the waters used for testing. However, the cupper content in the solutions is lowered and the surface appearance is obviously altered when the test temperature goes high.

关 键 词：内冷水 紫铜 腐蚀 

分 类 号：TG174.42[金属学及工艺—金属表面处理]